Xytronic lf 2900 temperature controlled 100w digital soldering station xytronic lf 2900 xytronics lf 2900 100w digital soldering station has a digital temperature readout and a soldering temperature range of 100 to 500degcits electronic circuitry maintains the soldering temperature by means of feedback from a temperature sensor located inside the soldering iron itself the electronic circuitry employs a zero voltage switching technique that prevents the generation of voltage and current